title: Image of the month. Retrorectal cystic hamartoma (tailgut cyst).
authors.affiliation: Oregon Health and Science University, Portland, OR, USA.
authors.forename: Skye C
authors.initials: SC
authors.lastname: Mayo
authors.forename: Hahn
authors.initials: H
authors.lastname: Huang
authors.forename: Nora
authors.initials: N
authors.lastname: Dobos
authors.forename: Kevin G
authors.initials: KG
authors.lastname: Billingsley
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology* / Q000601:surgery; D000328:Adult; D001707:Biopsy, Needle; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D003560:Cysts / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006222:Hamartoma / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D007813:Laparotomy / Q000379:methods; D008279:Magnetic Resonance Imaging; D008297:Male; D018570:Risk Assessment; D012445:Sacrococcygeal Region; D016896:Treatment Outcome